Ative substances



PATBNTED 113.23, 1869.

APPARATUS POR sAsoNING AND IMPRBGNATING lWoon WITH 'PBESBRVATWESUBSTANGBS.

2 SHBB'lS-BHBET 1.

'il i we ECKERYIUTMQGRAPHAMG co.. v/AswlGToN. D. c.

length of the chamber, inclining from their ends to the centre, andconnecting with pipes Q, leading to a close receiver, R.

These pipes aresupplied with cocks, S, to stop the fiow ofthecondensedmaterial from the chamber, when ever, -or as long as deemed desirable,the material flow-- ing back again into Vthe chamber,l when the cocksare closed, as soon as the conductors are illed.

with pipes at any suitable point or points, or may convey the condensedmaterial to any suitable receptacle..

The operation of removing the water or other niaterial vaporized at alow temperature may now he easily seen,v and also the process,- by whicha partial-vacuum is secured. The door or doors N heilig opened, and alsothe damper, at M, there will be a strong current of cold air around thechamber, cooling itl sntiiciently l to condense the vapors within on thesides.

When condensed, they will flowdown the sides, and into theconductors,and (the cocks S being opened) will pass to the receiver It.

. This evaporationof the water, and its condensation f and passage fromthe chamber, may' he continued until Ait is all removed.

If','then,'the iire be checked, andthe evolution o1' vapors be thuscaused to cease measurably, a partial vacuum will be secured. v i

The. removal ofthe water and moisture being eected, and the cold-airpassage and cocks S being closed, and the dil or other'oleaginoussubstance being heated to a temperature of, say,370 Fahrenheit, carbolicacid will hefevo1ved,which, filling the chamber, will he rapidly-1rbsubed bythe wood, and a pressure may be again generated, more,rapidly and surely driving it to the centre. .By raising the temperaturestillA higher, if' deemed best, the heavier oils or substances vaporizing ata high` temperature, may be now vaporized and applied or, it"considered dcsirableythe chamber may readily be filled with oil or othersubstance, to Acoat the surface.

If' it should be found to be desirable to introdnce light' oils orwater, in small quantities, while the caram u bolic acid is beingevolved, for the purpose of producing more rapidly and surely a pressureto force the acid to the-centre, it may be done by any convenient means,ora jet of supcrheated steam may be introduced. t t We do not limitourselves to anyparticnlarformofi.

chamber, nor to a chamber in which the oil or other@A `under the wood orsubstance being treated, as it is evi-'1' dent -that the oil may beconned to a smallsection of the chamber, or to an outward projectionfrom some i point thereof, but immediately connected and eonnnu-`nicating therewith; and other changes may be made,

without departing from the spirit or scope of our inf vention, it beingunderstood that, in our invention, we* always evaporate the oil, 85o.,in the' saine chamber, or in a part-of the chamber in which the materialto be treated is placed ior treatment, and never evaporate.

it in a separatevessel or retort, as has been the prac` tice heretofore,and then convey it to the chamber by Pipesl t YVe claim, for the purposeof treating wood, textile fabrics, or other material, with the' vaporsof `oleaginous or antiseptic substances or compounds, an apparatus soconstructed that the evaporation shall take place in the same-chamberlinwhich the wood is placed,` or ina section thereof, or in a projectionforming substantially a part of the same.

Also, in combination with the vaporizing and .woodtreating chamber,conductors, and suitable pipes and cocks, for carrying oi from the vchamber the condensed material, substantially as set forth.

vAlso, the combination, with a wood-treating chamber, of a cold-airpassage around the same, provided with devices for controlling, at will,the ingress and' egress of the air.

MARTIN uVOORHEES. GEO. W. N. CUSTIS. Witnesses: l t

-FRANK BOARDMAN, JAMns M. GAss'ADY.

